May they rest in peace.
I ended up learning a lot throughout this process (even though at the sacrifice of three Macintosh Plus’). For one, I managed to cut down the Retr0bright time from ~8 to just under 3 hours with no damage to the item. Here are the steps you could take to roughly achieve the same thing:
- Find a container (ideally plastic) slightly larger than the item you are about to Retr0bright and fill it up to the desired water level. This should either submerge the item completely or halfway.
- Once it is filled, turn on and submerge the immersion heater until you reach a water temperature of 180°F and then pour in the Retr0bright. Make sure to mix the contents of the container so that the Retr0bright is evenly diluted and the temperature is uniform. I roughly used about 1 liter of Retr0bright for every 10 Liters of water, but this can vary on a case by case basis.
- Wait for the temperature to reach 155F before submerging the item in.
- Cover the container to prevent heat from escaping. Wait 10 minutes or until the temperature drops to 140°F (whichever comes first) and then take the item out to cool.
- Lightly clean the case with a dry rag.
- Reheat the Retr0bright bath to 155°F and repeat steps 3 to 6 until a desired color is achieved.
- Finally, clean the case off thoroughly with water and dry.
Following these steps will pretty much ensure a uniform color restoration in under 3 hours. Some things I would advise to look out for so that you don’t repeat my mistakes is to make sure the container is properly suited to withstand this whole process, constantly monitor the temperature, and make sure you that the Retr0bright is reaching all areas of the case.
Anyway, that’s pretty much my update on The Plus Project so far. Moving forward, I have no idea what’s going to happen. I would like to eventually buy another Macintosh Plus and restore it properly, but I’m not really sure when I’ll have the time and/or funds to do that in the future. So for now this is it. Thanks for reading!